mcraddock1210
Member
I have been reading old posts on the site for a while now but just joined today as I have some questions about my first project.
This will be a new plastics recovrey system we are adding to an existing system. The existing system has a Micrologix 1400 PLC with no free Io so the idea was to ad a small CompactLogix PLC to this new system and message between them as we need to make sure the recovery system is running before we turn on the roots blower to deliver material.
I had though about using one of the new L30 series CompactLogix PLC's and a Panelview plus 600 as this is a dual box station and we may add a Prosoft module and weigh scales for each box station later.
We will have a total of 7 motors in the system but only 2 on the dual box station. We plan to use across the line starting as 20 HP is the largest motor.
I have not designed my E stop system yet but was considering using the Guard master 440 series form AB as it has anew Ethernet adapter out that you can read status into the PLC and I can display it on the Panel View.
I had planned to provide an e stop button on the dual box station itself and on the front of the control panel located about 50 feet away.
I don't know if I need safety rated contactors or any safety speed detection for the dual box station or not and wanted to get some input on it.
I stand at 6-2 and from the floor reaching up into the down tube I still can't reach the blades of the rotary airlock. I have been informed that operators will sometimes try to clear a material jam with a broom handle while the system and air lock is running but if they are caught will be terminated as it's considered a safety violation.
I consider that you would have to be trying to get injured on purpose to get injured on the equipment as it's so simplistic so would the estop going to a safety relay and the output of the safety relay going to the PLC be good enough for this application?
I have included a link below that has a photo of the equipment in question.
I know these are beginner questions but this is my first project since I graduated last year with my engineering degree. I am finding there are many thing out here in the field that we did not cover in college.
Thanks for your input and consideration. Michael Craddock
https://www.dropbox.com/sc/67shz3t5wpx3bwz/iC5lZq8pgc
https://www.dropbox.com/sc/67shz3t5wpx3bwz/iC5lZq8pgc
This will be a new plastics recovrey system we are adding to an existing system. The existing system has a Micrologix 1400 PLC with no free Io so the idea was to ad a small CompactLogix PLC to this new system and message between them as we need to make sure the recovery system is running before we turn on the roots blower to deliver material.
I had though about using one of the new L30 series CompactLogix PLC's and a Panelview plus 600 as this is a dual box station and we may add a Prosoft module and weigh scales for each box station later.
We will have a total of 7 motors in the system but only 2 on the dual box station. We plan to use across the line starting as 20 HP is the largest motor.
I have not designed my E stop system yet but was considering using the Guard master 440 series form AB as it has anew Ethernet adapter out that you can read status into the PLC and I can display it on the Panel View.
I had planned to provide an e stop button on the dual box station itself and on the front of the control panel located about 50 feet away.
I don't know if I need safety rated contactors or any safety speed detection for the dual box station or not and wanted to get some input on it.
I stand at 6-2 and from the floor reaching up into the down tube I still can't reach the blades of the rotary airlock. I have been informed that operators will sometimes try to clear a material jam with a broom handle while the system and air lock is running but if they are caught will be terminated as it's considered a safety violation.
I consider that you would have to be trying to get injured on purpose to get injured on the equipment as it's so simplistic so would the estop going to a safety relay and the output of the safety relay going to the PLC be good enough for this application?
I have included a link below that has a photo of the equipment in question.
I know these are beginner questions but this is my first project since I graduated last year with my engineering degree. I am finding there are many thing out here in the field that we did not cover in college.
Thanks for your input and consideration. Michael Craddock
https://www.dropbox.com/sc/67shz3t5wpx3bwz/iC5lZq8pgc
https://www.dropbox.com/sc/67shz3t5wpx3bwz/iC5lZq8pgc
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